Heidelberg 2022 – scientific programme
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T: Fachverband Teilchenphysik
T 84: Flavour Physics
T 84.7: Talk
Thursday, March 24, 2022, 17:45–18:00, T-H15
Untagged B0 → D*+ ℓ− νℓ studies with Belle II — Florian Bernlochner1, Lu Cao1, 2, Jochen Dingfelder1, and •Chaoyi Lyu1 — 1Physikalisches Institut der Rheinischen Friedrich-Wilhelms-Universität Bonn — 2Deutsches Elektronen-Synchrotron DESY
The precise determination of the CKM matrix element |Vcb| and semileptonic form factors in B meson decays are important for carrying out precision tests of the flavour sector of the Standard Model and to search for new physics. The decay of B0 → D*+ ℓ− νℓ is particularly well suited to determine |Vcb| due to its large branching fraction, small backgrounds and the availability of lattice data to describe the form factors. In this talk, we will present the current status of establishing an untagged measurement of the B0 → D*+ ℓ− νℓ branching fraction and form factors using early Belle II data.